How to Fix Windows Apps That Won't Open or Crash on Launch

Diagnose the symptom

• Nothing happens when you click — the app may be running invisibly, blocked, or corrupted.
• Opens then closes instantly — crash on startup; check Event Viewer.
• Error dialog — note the exact message; search it with the app name.

Step 1: End ghost processes

Press Ctrl+Shift+Esc, find the app in Processes (it may be running with 0% CPU), select and End task. Then relaunch. A surprising number of "won't open" cases are zombie processes.

Step 2: Restart your PC

Yes, really. Windows Fast Startup leaves the system in a weird half-booted state; a restart fixes broken services the app depends on.

Step 3: Check the crash log

Open Event Viewer → Windows Logs → Application and look for red Error entries at the time of the crash. The "Faulting module" line tells you which DLL is at fault — often a driver, codec or antivirus component.

Step 4: Repair or reset the app

Settings → Apps → Installed apps → app → Advanced options:

• Repair first (keeps your data), then Reset (wipes app data) if needed.
• For classic desktop apps, use the installer's Repair option or reinstall over the top.

Step 5: Run in compatibility mode

Right-click the app's EXE → Properties → Compatibility → tick Run this program in compatibility mode for and try Windows 8 or 10. Fixes many older apps on Windows 11.

Step 6: Rule out antivirus and security

Temporarily disable third-party antivirus real-time protection and test. If the app opens, add it to the AV's exclusion list. Check Windows Security → App & browser control → Reputation-based protection isn't blocking it.

Step 7: Check dependencies

Missing runtimes cause silent launch failures: install the latest Visual C++ Redistributables, .NET and DirectX from Microsoft's official pages. Run sfc /scannow afterwards to repair system files.